For the Christmas and New Year's Day holidays, orders placed after 1:00PM EST on Friday, 12/21 will be shipped on Wednesday, 12/26. Orders placed after 1:00PM EST on Friday, 12/28 will be shipped on Wednesday, 1/2/19.

UPS and USPS do not guarantee delivery times through the end of the year. This may include an extra day in ground shipping and later delivery for overnight services.

Is your business tax exempt? Email us your tax exempt form. After we review and approve your submission (allow 3-5 business days), your orders placed online will not include sales tax when you are logged in.

If tax exempt, the Company Name field above must match the name on your tax exempt certificate.

These blocks are coated with a layer of black thermoplastic. This coating makes these magnets very water resistant and virtually indestructible. They can be slammed together with little threat of damage to the magnets. The rubber-like coating is grippy, which is great when sliding is a problem, like we describe in our Leverage & Friction article.

The dimensions of these magnets are the outer dimensions of the thermoplastic.